Q: Which of the following is the correct formula for density?

$$\text{Density} = \text{mass} / \text{volume}$$

Q: A patient’s IV bag contains 1.5 liters of saline. How many milliliters is this?

$$1.5 \times 1000 = 1500\ \text{mL}$$

Q: Which of the following is the correct conversion factor to convert gallons to liters?

$$1\ \text{gallon} = 3.78\ \text{liters}$$

Q: A student needs to convert 2.5 kg to grams. What is the correct answer?

$$2.5 \times 1000 = 2500\ \text{g}$$

Q: Which of the following is the correct equality for converting between meters and centimeters?

$$1\ \text{m} = 100\ \text{cm}$$

Question 1

Which of the following is the correct metric unit for measuring the mass of a medication dose?

Accepted Answer

Gram (g)

Question 2

A nurse needs to administer 5.0 g of aspirin. How many significant figures are in this measurement?

Accepted Answer

2 sig figs

Question 3

Which of the following correctly converts a temperature of 25°C to Kelvin?

Accepted Answer

$$25 + 273 = 298\ 	ext{K}$$

Question 4

A student measures the length of a table as 1.20 meters. How many significant figures does this measurement have?

Accepted Answer

3 sig figs

Question 5

Which of the following is the correct formula for density?

Accepted Answer

$$	ext{Density} = 	ext{mass} / 	ext{volume}$$

Question 6

A sample has a mass of 8.0 g and a volume of 2.0 mL. What is its density?

Accepted Answer

$$4.0\ 	ext{g/mL}$$

Question 7

Which of the following is NOT a base unit in the metric system?

Accepted Answer

Inch (in)

Question 8

A medication contains 50.0 mg of a drug. How many significant figures are in this measurement?

Accepted Answer

3 sig figs

Question 9

Which of the following is the correct prefix and meaning for 'milli-' in the metric system?

Accepted Answer

Prefix for $$10^{-3}$$ times the unit

Question 10

A student multiplies $$2.56 	imes 3.1$$ using measured numbers. How many significant figures should the answer have?

Accepted Answer

2 sig figs

Question 11

Which of the following is an example of an exact number?

Accepted Answer

8 cookies

Question 12

A patient’s IV bag contains 1.5 liters of saline. How many milliliters is this?

Accepted Answer

$$1.5 	imes 1000 = 1500\ 	ext{mL}$$

Question 13

Which of the following is the correct conversion factor to convert gallons to liters?

Accepted Answer

$$1\ 	ext{gallon} = 3.78\ 	ext{liters}$$

Question 14

A scientist records a measurement as 0.00570 g. How many significant figures does this value have?

Accepted Answer

4 sig figs

Question 15

Which of the following is the correct order of steps for using conversion factors?

Accepted Answer

State the given and desired unit, write the equality, set up the problem, apply the conversion factor

Question 16

A block has a mass of 250 g and a volume of 50.0 cm$$^3. $$What is its density in g/cm$$^3$$?

Accepted Answer

$$5.0\ 	ext{g/cm}^3$$

Question 17

Which of the following is the correct rule for rounding when the digit to be dropped is 5 or greater?

Accepted Answer

Round up the last retained digit by one

Question 18

A student needs to convert 2.5 kg to grams. What is the correct answer?

Accepted Answer

$$2.5 	imes 1000 = 2500\ 	ext{g}$$

Question 19

Which of the following is the correct equality for converting between meters and centimeters?

Accepted Answer

$$1\ 	ext{m} = 100\ 	ext{cm}$$

Units of Measurement and Scientific Calculations in GOB Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard